Self-adhesive and easy to trim with household scissors, this tape makes that boring grid disappear, leaving nothing to detract from your new beautifully crafted, custom ceiling. Shipped in 100 foot rolls. For use in suspended/drop ceiling installations, one roll is recommended for every 20 two-foot square ceiling tiles. Class A fire rated. The drop ceiling grid must be dry and free of dusts, oils, and contaminents. Cleaning the T- bar with alcohol or other solvent prior to installation is recommended.